David K. Joyce

Rare Minerals

Unusual and rare minerals that I felt would be better here than in some other category! :)

All prices in Canadian dollars. For payment in US$, deduct 21% or multiply by 0.79.

Click on any of the following thumbnails to view a larger image of the specimen.

ProbertiteRare Minerals
  • Item #4382
  • Probertite
  • 6.3x2.0x0.7 cm
  • Largest Crystal Size: n/a
  • $25.00
  • Cheverie

  • Nova Scotia, Canada
  • White aggregates and needles of probertite are present on one end of this thin gypsum fragment. Nice!
Vuagnatite, McguinnessiteRare Minerals
  • Item #21935
  • Vuagnatite, Mcguinnessite
  • 6.4x5.0x2.1 cm
  • Largest Crystal Size: 1mm
  • $75.00
  • Ukiah
  • Mendocino County
    California, USA
  • The top of this plate is largely covered with transluscent, white-colourless vuagnatite crystals (some very sharp!) and green, hemispheres of greenish mcguinnessite. Nice combination!
Semenovite-(Ce), EpididymiteRare Minerals
  • Item #15007
  • Semenovite-(Ce), Epididymite
  • 6.5x4.4x2.2 cm
  • Largest Crystal Size: micro
  • $75.00
  • Taseq
  • Ilimaussaq
  • A couple of isolated, well formed semenovite crystals are present in a vug mostly lined with excellent, colourless, epididymite crystals.
MerwiniteRare Minerals
  • Item #21931
  • Merwinite
  • 5.5x3.2x1.4 cm
  • Largest Crystal Size: 1mm
  • $35.00
  • Crestmore Quarry
  • Riverside County
    California, USA
  • Whitish crystals of this unusual calc-silicate mineral are embedded in this piece. Unusual.
ZunyiteRare Minerals
  • Item #21926
  • Zunyite
  • 6.6x4.3x2.8 cm
  • Largest Crystal Size: 1mm
  • $75.00
  • Big Bertha Mine
  • Quartzite
    Arizona, USA
  • This fragment of quartz.mica matrix contains many hundreds of colourless to beigey zunyite crystals. The crystals are very well formed and are, generally, combinations of cube and octahedron with the octahedron dominating some times. Rich sample with many sharp crystals.
Thomsenolite, Siderite, Sphalerite, RalstoniteRare Minerals
  • Item #20931
  • Thomsenolite, Siderite, Sphalerite, Ralstonite
  • 12.4x9.0x7.5 cm
  • Largest Crystal Size: 6mm
  • $425.00
  • Ivigtut Deposit
  • Ivittuut, Arsuk Fjord
  • There are cavities all over this specimen that are lined with superb, elongated, terminated thomsenolite crystals. Of course as is usually the case, the thomsenolite is white but has a light coating of iron oxide that give the specimen its classic look. Matrix appears to me massive thomsenolite with a few small siderite and sphalerite crystals embedded in it. As well, there are small cube-octahedral ralstonite crystals on the thomsenolite crystals, inside the vugs. We don't seem much of this material around any more!
CornubiteRare Minerals
  • Item #21932
  • Cornubite
  • 3.5x2.9x2.2 cm
  • Largest Crystal Size: micro
  • $55.00
  • Hardshell Mine
  • Santa Cruz County
    Arizona, USA
  • Lots of tiny, green crystals of this rare copper arsenate in and on the gossanous matrix of this piece.
RaiteRare Minerals
  • Item #21959
  • Raite
  • 3.8x2.8x2.0 cm
  • Largest Crystal Size: micro
  • $65.00
  • Indian Mountain
  • Kola Peninsula
  • There are many open spaces in this matrix that reveal beautiful crystal sprays of the rare Sodium-manganese-titanium silicate raite. There are supposed to be zorite crystals(?) in the cavities as well but I cannot recognize them. Maybe you can?! Very nice raite!
CarparthiteRare Minerals
  • Item #21937
  • Carparthite
  • 7.0x6.0x5.1 cm
  • Largest Crystal Size: 6mm
  • $65.00
  • Picacho Mine
  • San Benito Co.
    California, USA
  • This specimen has some openings that contain yellowish crystals of this unusual mineral that is composed of just carbon and hydrogen! Some nice crystals here!
StrengiteRare Minerals
  • Item #21945
  • Strengite
  • 4.3x2.5x1.6 cm
  • Largest Crystal Size: 0.5mm
  • $40.00
  • Indian Mountain
  • Cherokee County
    Alabama, USA
  • Beautiful well formed crystals are present both on the darker oxide matrix and as thicker covering on the other side of the specimen. Not all crystals are undamaged but there are many that are perfect and excellent for photography!
KleiniteRare Minerals
  • Item #21951
  • Kleinite
  • 5.8x3.0x3.2 cm
  • Largest Crystal Size: 1.5mm
  • $65.00
  • McDermit
  • Humboldt County
    Nevada, USA
  • Much of the front of this specimen is covered with rough but coherent crystals of kleinite. When I fist saw this mineral, I thought perhaps it was a uranium mineral, it is so yellow. No, it is a mercury mineral. Rare!
Felsobanyaite, GypsumRare Minerals
  • Item #21955
  • Felsobanyaite, Gypsum
  • 3.7x2.8x2.8 cm
  • Largest Crystal Size: n/a
  • $40.00
  • Chickerell
  • Dorset
  • OK, it is not pretty! It IS unusual, though! White aggregates of this unusual aluminum sulfate mineral intermixed with elongated growths of gypsum. Was labelled originally as "basaluminite", which is a pseudonym for felsobanyaite. Unusual!
UssingiteRare Minerals
  • Item #21961
  • Ussingite
  • 4.7x4.3x3.2 cm
  • Largest Crystal Size: n/a
  • $65.00
  • Mt. Punkurauj
  • Chibiny Massif, Kola Peninsula
  • A fragment of massive ussingite ranging from light mauve to purple. Rich!
ArrojaditeRare Minerals
  • Item #21979
  • Arrojadite
  • 8.0x5.9x1.1 cm
  • Largest Crystal Size: 4mm
  • $110.00
  • Rapid Creek

  • Yukon, Canada
  • A plate of crystals of both quartz and arrojadite. The arrojadite crystals are sharp, well formed crystals that cover 40-50% of the top of this plate with quartz crystals covering the rest. Nice!
TellurobismuthiteRare Minerals
  • Item #21991
  • Tellurobismuthite
  • 5.6x5.1x3.5 cm
  • Largest Crystal Size: 2mm cleavage
  • $45.00
  • Fyresdal

  • Norway
  • Lots of bright, lustrous cleavages of this unusual telluride scattered throughout this quartz matrix. Rich!
Brewsterite, BaryteRare Minerals
  • Item #21992
  • Brewsterite, Baryte
  • 3.5x3.4x2.2 cm
  • Largest Crystal Size: 2mm
  • $35.00
  • Strontian
  • Argyllshire
  • This thick plate has its top covered with white crested baryte crystals which have a generous sprinkling of sharp brewsterite crystals. There is sphalerite or wurtzite embedded in the matrix. From the type locality!
Clinoptilite-CaRare Minerals
  • Item #22167
  • Clinoptilite-Ca
  • 3.7x3.7x2.3 cm
  • Largest Crystal Size: 2mm
  • $45.00
  • Succor Creek

  • Oregon, USA
  • This geode-like, quartz nodule is hollow and completely lined with tabular, sharp, gemmy clinoptilite crystals. Excellent!
Sarabauite, StibniteRare Minerals
  • Item #22548
  • Sarabauite, Stibnite
  • 6.2x4.5x1.7 cm
  • Largest Crystal Size: n/a
  • $55.00
  • Sarabau Mine
  • Sarawak, Borneo
  • Rich, red sarabauite is associated with metallic stibnite, both being embedded in calcite and wollastonite. This is the type locality for this unusual antimony mineral!
EuxeniteRare Minerals
  • Item #22655
  • Euxenite
  • 1.9x1.3x0.5 cm
  • Largest Crystal Size: as above
  • $55.00
  • Ankazobe

  • Madagascar
  • A flattened cluster of slightly radioactive euxenite crystals. The crystals have a thin creamy alteration coating and an interior of resinous dark brown.
MendipiteRare Minerals
  • Item #22656
  • Mendipite
  • 3.7x2.2x1.2 cm
  • Largest Crystal Size: n/a
  • $45.00
  • Merehead Quarry
  • Mendip, Somerset
  • A solid zone of mendipite, the rare lead oxy-chloride mineral from the type locality.
Jamborite, SideriteRare Minerals
  • Item #22676
  • Jamborite, Siderite
  • 11.8x7.8x3.8 cm
  • Largest Crystal Size: 3mm
  • $75.00
  • Sterling Mine
  • Antwerp
    New York, USA
  • Sharp, acicular pseudomorphs of jamborite after millerite are tucked away here and there in interstices of this wide, shallow siderite crystal pocket. Classic Sterling Mine! R
Dawsonite, CalciteRare Minerals
  • Item #22797
  • Dawsonite, Calcite
  • 16.0x6.0x3.6 cm
  • Largest Crystal Size: 7mm
  • $65.00
  • St. Bruno
    Quebec, Canada
  • Masses of dawsonite fibers are present in fracture in this apparent limestone matrix. openings in the rock are lined with calcite rhombs. Unusual! R
HinsdaliteRare Minerals
  • Item #24683
  • Hinsdalite
  • 7.5x3.5x2.9 cm
  • Largest Crystal Size: 3mm
  • $75.00
  • Sylvester Mine
  • Zeehan, Tasmania
  • Elongated, hexagonal laths of pure white hinsdalite, very similar to specimens illustrated on mindat.org. Nice specimen of a relatively rare mineral! s
Rosenbuschite, Eudialyte, AegirineRare Minerals
  • Item #25064
  • Rosenbuschite, Eudialyte, Aegirine
  • 7.0x4.0x4.8 cm
  • Largest Crystal Size: n/a
  • $75.00
  • Norra Karr,

  • Sweden
  • Some 1-2mm orangey-brown crystals of rosenbuschite are embedded in this nepheline-eudialite-aegirine rock. Rare!